\begin{tikzpicture}
    \tkzDefPoints{0/0/D, 1.8/0/A, 2.5/3.0/B}
    \tkzDefPointBy[rotation=center A angle -20](D)  \tkzGetPoint{E}
    \tkzDefPointBy[rotation=center A angle -20](B)  \tkzGetPoint{C}

    \tkzDrawPolygon(D,A,B)
    \tkzDrawPolygon(E,A,C)
    \tkzMarkAngles[size=0.6](E,A,D  C,A,B)
    \tkzLabelAngle[pos=1.0](E,A,D){$1$}
    \tkzLabelAngle[pos=1.0](C,A,B){$2$}
    \tkzLabelPoints[left](E,D)
    \tkzLabelPoints[right](A,C)
    \tkzLabelPoints[above](B)
\end{tikzpicture}

